THE AMERICAN MUSEUM JOURNAL 



nest. Incubation is evidently shared by all members of this com- 

 munistic family and the care of the young is also a common duty. 

 Nests, eggs, adults and young were secured which will fully 

 illustrate the nesting habits of this interesting bird. 



Material was also gathered for a group of white-crowned 

 Pigeons and numerous specimens of Bahama birds were added to 

 the study collection. 



Professor Wheeler and Dr. Dahlgren devoted their time to 

 collecting and observing the marine and terrestrial invertebrates. 

 Careful color sketches were made of many of the marine species, 

 with a view to reproducing their living portions in the exhibition 

 collections of the Museum. Some of the larger marine mollusks 

 were modeled from life and drawings made of them. Specimens 

 embodying the results of these studies are in course of prepara- 

 tion and will soon be on exhibition. Materials were also obtained 

 for a group of the land-crabs so characteristic of tropical Florida, 

 the Bahamas and other islands of the West Indies. 



The coloration of the corals was found to be rather dull; 

 various shades of yellow predominating, and a bright green or 

 black being seen only occasionally. The coloration of the 

 sponges, on the other hand, is of a most brilliant nature, ranging 

 from bright yellow, orange, red and even vivid purple to a deep 

 black. By the aid of the notes obtained it will be possible to 

 restore accurately the color of a great number of the specimens in 

 the sponge collection, thus giving some idea of their remarkable 

 appearance in a living condition. 



Among terrestrial invertebrates Professor Wheeler collected a 

 fine series of mollusks (mainly of the genus Strophia) to illustrate 

 geographical distribution and variation, many Myriapoda and 

 Arachnida (chiefly Opilionidas) and practically complete series 

 of the ants (Formicidse) of Andros and New Providence Islands. 

 Only four or five species of Formicidse have been described from 

 the Bahamas. About 50 species, including several new ones 

 of interest in connection with the ant faunas of Cuba and Florida, 

 were taken on the two above-mentioned islands and the adjacent 

 keys. Many of the species have become singularly modified in 

 their habits. Owing to the very small amount of soil on Andros 



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